艾俊强,谢露.基于混合RANS/LES方法的亚声速空腔流动主要影响因素的数值研究[J].南京航空航天大学学报,2022,54(5):927-936 |
基于混合RANS/LES方法的亚声速空腔流动主要影响因素的数值研究 |
Numerical Study on Main Influencing Factors of Subsonic Cavity Flow Based on Hybrid RANS-LES Method |
投稿时间:2022-08-10 修订日期:2022-09-20 |
DOI:10.16356/j.1005-2615.2022.05.017 |
中文关键词: 混合RANS/LES方法 空腔流动 网格敏感性 来流马赫数 串列空腔 |
英文关键词:hybrid RANS/LES method cavity flow grid sensitivity far field Mach number tandem cavities |
基金项目:国家重点研发计划(2019YFB1704204);航空科学基金(2019ZA003002)。 |
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中文摘要: |
随着计算流体力学(Computational fluid dynamics, CFD)技术的发展,混合雷诺平均N-S方程(Reynolds averaged Navier-Stokes, RANS)/大涡模拟(Large eddy simulation, LES)类方法被越来越多地应用于航空领域的大分离流动及气动噪声的仿真分析中,并取得了很好的效果。本文选取M219空腔流动风洞试验模型,在Ma=0.85的情况下,进行了混合RANS/LES方法的验证,并进行了网格敏感性分析;然后针对影响空腔流动的几个关键因素进行了仿真研究,并给出了主要的研究结果;最后,针对L/D=7的大长深比空腔,研究了增加隔板形成前后两个L/D=3.5的串列空腔的流动特点。 |
英文摘要: |
With the development of computational fluid dynamics (CFD) technology, the hybrid Reynolds averaged Navier-Stokes (RANS)/large eddy simulation (RANS/LES) method has been increasingly applied to the simulation of large separation flows and aeroacoustics in the aviation field, and fine results have been achieved. In this paper, the M219 wind tunnel model is selected to validate the hybrid RANS/ LES method under the condition of Ma=0.85, and the grid sensitivity analysis is carried out. Then, several key factors affecting the cavity flow are simulated, and the main results are obtained. Finally, the flow characteristics of tandem cavities with L/D=3.5 derived from a cavity with L/D=7 through inserting a plate in the middle are studied. |
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